螺线管结构 solemoid structure 真核生物染色体的二级结构，一级时由核小体纤丝(10nm) 构成，二级结构由由核小体纤丝进一步螺旋形成30nm螺线管，每个螺旋由六个核小体组成。
基于以上原理设计了螺线管聚磁光路结构。
The optical structure based on solenoid collecting magnetic field is designed based on the principle above.
给出了电子束的横向温度随电极结构和螺线管纵向磁场的变化情况。
The electron beam transverse temperature variations with anode region and acceleration tube design parameters as well as the uniform solenoidal magnetic field are presented.
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